Influence of training system on yield and quality of two apricot cultivars | Influence du système de conduite sur le rendement et la qualité de deux variétés d'abricot
2009
Monney, Ph. | Evéquoz, N., Station de recherche Agroscope Changins-Waedenswil ACW, Conthey (Switzerland). Centre de Conthey
Four training systems (free multiple leader, V-trellised multiple leader, Y-trellised and Solaxe) were compared with the apricot varieties Bergarouge and Harostar during nine years. The influence of increased planting density and tree height limitation on tree growth and productivity, sensitivity to canker due to Eutypa lata and Cytospora ssp. as well as on fruit size were analyzed and discussed. Planting density did not improve performance, neither in early bearing phase, nor during mature tree phase. Tree growth and habitus as well as training according to tree formation influenced canker development due to Eutypa lata and Cytospora ssp. Harostar presented more severe symptoms than Bergarouge. Both intensive systems (Y-trellised and Solaxe) showed a stronger weakening in response to severe pruning. In extreme cases, this also contributed to fruit size decrease. Actual available rootstocks are too vigourous for planting densities higher than 500 trees/ha, except for particular cases.
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